html,
body {
  width: 100%;
  height: 100%;
}
li {
  list-style-type: none;
}
body {
  display: flex;
  flex-direction: column;
}
body .nav {
  flex: 0 0 80px;
  margin-bottom: 0px;
}
body .body-warper {
  width: 100%;
  flex: 1;
}
body .body-warper .main-body {
  width: 100%;
  height: 100%;
  display: flex;
}
body .body-warper .main-body .left-menu {
  flex: 0 0 120px;
}
body .body-warper .main-body .right-body {
  flex: 1;
}
